Knitting-machine burr



E. VERMILYEA 8v 0. E. NORRIS. Knitting Machine Burr.

No. 229,651. Patented July 6, 1880.

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- UNITED STATES PATENT OFFICE.

EUGENE VERMILYEA AND CHARLES E. NORRIS, OF MILLBURY, ASSIGNORS OFONE-THIRD OF THEIR RIGHT TO JONATHAN LUTHER, OF WORCESTER,

MASSACHUSETTS.

KNITTING-MACHINE BURR.

SPECIFICATION forming part of Letters Patent No. 229,651, dated July 6,1880.

Application filed March 31, 1879. I

To all whom it may concern:

Be it known that we, EUGENE VERMILYEA and CHAS. E. NORRIS, of Millbury,in the county of Worcester and State of Massachusetts, hax e inventedcertain new and useful Improvements in Knitting Machine Burrs; and we dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit pertains to make and use it, reference being had to the accompanyingdrawings, whichform part of this specification.

Our invention relates to an improvement in the burrs for rotaryknitting-machines, its ob- 5 ject being to reduce the expense of repairwhen a hook is broken off or worn out and to give the blade a firm seatin the hub.

Knitting-machine burrs have heretofore been provided with blades formedwith one end hooked, and when the hook is broken off or worn out theblade is of nofurther use, and must be replaced by a new one.

In our improved burr each blade has aknitting-hook at both ends and ashank projecting from midway its back edge, the front edge being of suchshape that when the back edge is placed in its slit in the hub andsnugly upon its seat one of the hooks will stand in proper position forwork and the other will 0 be embraced and protected by the slit.

The hub is provided with the usual oblique slits in its outer periphery,and these slits are intersected by an interior groove, through whichpass the shanks of the blades, said 55 shanks being clamped edgewisebetween a flange of the bushing which fits in the hub and the edge of awasher fitting upon the shank of said bushing, and held in place by aclamp-nut fitting upon a screw-threaded por- 40 tion of said shank. Theshanks of the blades have shoulders at opposite edges, intermediate oftheir lengths, and the slits in the hub are deepened at one side of theintersecting groove to form seats for those shoulders, so that when 5the blade is in place its back edge rests upon the bottom of the slit onthe inner side of the groove and one of the shoulders of its shank restsupon the seat formed for it on the other side of the groove, thuscausing the outer end of the blade to project with its hook in a workingposition, as will be hereinafter more fully described with reference tothe drawings illustrating our invention.

Should one of the hooks be broken off or worn out in use, it is onlynecessary to reverse 5 5 the endwise position of the blade, when a newhook will be presented for use. So it will be observed that one blade ofour improved construction is equal in utility to two of the old form,andby having a central shank with a seat on both sides of it the blade ismore steadily and firmly held in the hub than are blades seated on astraight edge, or a seat on one side only of a shank.

Our inventlon consists, first, in a knittingmachine burr-blade taperingboth ways from the middle and having a knitting-hook formed at each endand a central shank projecting from its back edge, so that when placedin the hub with one hook projecting in a working position the other willbe embraced by the blade-slit of the hub, and said blade will have aseat on opposite sides of its shank, as hereinafter more particularlydescribed.

It consists, further, in the combination of a 7 5 series of such bladeshaving properly-shouldered shanks with an obliquely -slitted hubprovided with suitable seats for the back edges of the blades and forthe shoulders of their shanks, and clamping devices for engaging theshanks and holding the blades in place, all as more fully hereinafterdescribed and specifically claimed.

In the accompanying drawings, Figure 1 represents alongitudinal sectionof a burr-cyl- 8 indcr. Fig. 2 is a section of the same on the line ofone of the oblique blade-slits, the blade being shown in workingposition. Fig.3 is a peripheral view of the hub provided with theoblique slits which form the blade-seats. Fig. 4 is a side elevation ofthe bushing, which is an element of the clamping device. Fig. 5 is aside elevation of the washer, which is also an element of the clampingdevice. Fig. 6 is an edge view of the clamping-nut. Fig. 7 is an 5 edgeview, and Fig. 8 a side view, of one of the blades detached.

A denotes the hub, having slits B B cut obliquely across the peripheryand extending in and through an inner narrow annular groove, a, which isjust wide enough to admit thenarrower portion H of the shank of theblade and one of the shoulders h of said shank, the other shoulder beingintercepted by the seat a, formed at one side of the groove by deepeningthe slit. The said narrower portion H of the shank is thus caused toextend obliquely in ward through the hub in position to be clampededgewise between the bearin g I) of the washer D and the flange Got thebushing. The washer D is held to place by the nut E on the screw 0" atthe end of the bushing.

G and G denote the knittinghooks, one at each end of our blade F, whichis adapted to be used either end to the work in the knittingburr, sothat when one hook is worn out or defective the blade can be turned soas to pre sent the new or perfect hook.

While one book is in position for work, as shown at G in Fig. 2, theother, as at G, is embraced by the slit and protected from accidentalbreakage and prevented from catching the yarn.

Another advantage of this form of blade is, that it gives a firmer andbetter bearing in the hub, on account of having a seat on both sides ofits shank.

Blades are struck out with a die under a press and finished by simplyrattling; hence it costs no more to make our blade with a double bookthan to make a blade with only one hook.

What we claim is 1. A knitting-machine burr-blade tapering both waysfrom the middle, and having a knitting-hook formed at each end and acentral shank projecting from its back edge, said blade being adaptedfor use substantially as set forth.

2. The combination, with a series of reversible blades, F, havingknitting-hooks at each end and central shanks provided with shoulders h,of the hub A, having the oblique slits B, interior groove, a, and seata, the bushing having the flange C, the washer D,and clamp-nut E,substantially as described.

In testimony that we claim the foregoing we have hereunto set our handsand seals this th day of March, 1879.

EUGENE VERMILYEA. [L. 3. CHARLES E. NORRIS. IL. 3.

Witnesses IRA N. GODDARD, R. (3. CUNNINGHAM.

